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KM125A Service Manual

1. YILINI O 6 sesues 1 37949 3Z33u4 103 NIE 310A9 LSSANVH 31040 3Z33H3 3049 1S3AMNH 31040 3233H3 37949 LSSAYVH 37040 3z33H3 S015 SSA 3WVN Luvd 31949 1S3AUVH VO0OL INM LNHVHO ONIWIL 24 s YPI IKV LHI I III IIIIIKIQXIH H HIIIIIIICICI gt GKCCI KVC lt LIL IHIIISTSTTT MISI ITI K IIIII 340 NO 9X AV 133 _ 440 Noj wxavHH 2 sm AS XAVHM o gt 2 e mmm ASIAM 2 NO 2X AVTSY rrrrs uC 52 wa I Ii 330 HOLIWS NO IOHLNOO 288 06 TES 3 0 EN mnr rn r I NO BATWASNINV319 1 BO SAYA 29501 e 098 01 lt gt 5959 ee 440 SKIVA SSINM unu 9 XEN 4 uw 9 XEN iae 9 XEN ig 9 XEN lt gt unu 9 XEN gt 9 XEN ie gt g i i I SV9 LOH l ji 1 i 1 I I i I Taye 10 440 ueixn y i i NO 49 8 JO i 28s OL gt osor i 2950 50 295 0 gt 6
2. 2 Tighten O replace recommended voltage disconnect if any replace 2 Bad contacts 2 Check for continuity and eplace d Bin Control Switch 1 Tripped with bin filled 1 Remove ice with ice replace Control replace or coil winding opened g Wiring to Control 1 Loose connections or Board open replace h Thermistor 1 Leads shorted or open 1 See Il 4 HARVEST High Temperature CONTROL Safety operates If THERMISTOR open unit will start but have long harvest cycle i Hot Gas Solenoid 1 Continues to open in 1 Check for power off in Valve freeze cycle and High freeze cycle and replace Temperature Safety operates j Water Supply Line 1 Water supply off and 1 Check and get water supply cycle does recommended pressure not finish Check for water supply k Inlet Water Valve 1 Mesh filter or orifice 1 Clean Replace if gets clogged and water necessary supply cycle does not finish 2 Coil winding opened 3 Wiring to Water Valve 3 Check for loose connection or open and replace 1 Control Board 1 Defective 1 See Il 3 d CONTROL BOARD CHECK PROCEDURE 28 continues to disconnected and the defective switch not start freely b Control Board 1 Defective 8 Compressor a Control Switch 1 WASH position 1 Move to ICE position will not start or 2 Bad contacts 2 Check and replace intermittently Control Condenser too warm temperature
3. 12 Flush the Storage Bin with water 13 Move the Control Switch to the ICE position and start the automatic icemaking process 14 Close the Door Replace the Louver in its correct position 2 MAINTENANCE a EXTERIOR PANELS To prevent corrosion wipe the exterior occasionally with a clean and soft cloth Use a damp cloth containing a neutral cleaner to wipe off all oil or dirt build up b STORAGE BIN AND SCOOP Wash your hands before removing ice Use the plastic scoop provided Accessory The Storage Bin is for ice use only Do not store anything else in the bin Keep the scoop clean Clean it by using a neutral cleaner and rinse thoroughly Clean the bin liner by using a neutral cleaner Rinse thoroughly after cleaning 58 c AIR FILTER The plastic mesh Air Filter removes dirt or dust from the air and keeps the Condenser from getting clogged As the filter gets clogged the icemaker s performance will be reduced Check the filter at least twice a month When it is clogged use warm water and a neutral cleaner to wash the filter d CONDENSER Check the Condenser once a year and clean if required by using a brush or vacuum cleaner More frequent cleaning may be required depending on the location of the icemaker 3 PREPARING THE ICEMAKER FOR LONG STORAGE IMPORTANT When shutting off the icemaker for an extended time drain out all water from the water lines and remove the ice from the Storag
4. 6 e NORMAL HARVEST CYCLE 6 3 CONTROL BOARD oe 8 a CONTROL BOARD 9 b FEATURES e 10 c CONTROLS AND 6 5 12 d CONTROL BOARD CHECK PROCEDURE 17 e CONTROL BOARD 18 4 HARVEST CONTROL THERMISTOR 18 5 BIN 19 a EXPLANATION OF 19 b BIN CONTROL CHECK PROCEDURE 19 6 SWITCHES 20 a CONTROL SWITCH Ps UT nennen tnmen 20 b SERVICE SWITCH 20 TECHNICAL 21 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT 21 2 WIRING DIAGRAM 22 a PRODUCTION 2008 Auxiliary Code T 1 U 1 22 b PRODUCTION 2009 Auxiliary Code U 1 OR LATER 23 3 TIMING 24 C e ce eee ene ee 24 lS d Epor M E 2
5. DRAIN Outlet G3 4 connected at rear side ICE MAKING SYSTEM Vertical Evaporator with water flow on both sides COMPRESSOR Hermetic Model SC12DL Danfoss CONDENSER Air cooled Fin and Tube type HEAT REJECTION 1650W 1420kcal h AT 32 C WT 21 C EVAPORATOR Vertical type Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A 360g ICE MAKING CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water Thermistor and Timer ICE MAKING WATER CONTROL SYSTEM Timer Controlled Overflow Pipe BIN CONTROL SYSTEM Mechanical Bin Switch ELECTRICAL PROTECTION Class Appliance Fuse CONT BOARD CIRCUIT PROTECTION High Voltage Cut out COMPRESSOR PROTECTION Auto reset Overload Protector Internal REFRIGERANT CIRCUIT PROTECTION Auto reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ICE MAKER PROTECTION Interlock by Control Board WEIGHT Net weight 70kg Gross weight 85kg PACKAGE Carton 845mm W X 800mm D X 955mm H ACCESSORIES Instruction Manual Scoop Leg 4 pcs Drain Adapter Outlet Hose Duct Screw 3 pcs OPERATION CONDITIONS VOLTAGE RANGE 198 254V AMBIENT TEMP 1 40 WATER SUPPLY 5 35 C WATER SUPPLY PRESS 0 7 8bar 0 07 0 8Mpa We reserve the right to make changes in specifications and design without prior to notice I GENERAL INFORMATION 1 CONSTRUCTION a KM 100A KM 125A Side Panel L Condenser Fan Mo
6. the Access Suction Discharge lines Do not change this order with nitrogen gas flowing at a pressure of 0 2 0 3 bar 13 Install the new Drier see 4 DRIER 14 Check for leaks using nitrogen gas 10 bar and soap bubbles 15 Evacuate the system and charge it with refrigerant see 1 c EVACUATION AND 37 RECHARGE 16 Connect the Solderless Terminals and replace the Terminal Cover in its correct position 17 Refit the panels in their correct positions 18 Plug in the icemaker or connect the power source Note Hoshizaki recommends that Compressor starting electrics are always replaced at the same time as the Compressor 4 DRIER IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened Do not replace the Drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel and Rear Panel 3 Recover the refrigerant and store it in a proper container if required by an applicable law see 1 b REFRIGERANT RECOVERY 4 Remove the Drier Holder if any and pull the Drier toward you for easy service 5 Remove the Drier using brazing equipment 6 Braze the new Drier with the arrow on the Drier in the direction of the refrigerant flow Use nitrogen gas at a pressure of 0 2 0 3 bar when brazing tubings Braze in an Access Valve using a tee if necessary 7 Check for leak
7. HOSHIZAKI SELF CONTAINED CRESCENT CUBER MODEL KM 100A KM 125A SERVICE MANUAL IMPORTANT This manual should be read carefully before the icemaker is serviced or maintenance operations are performed Only qualified service technicians should install service and maintain the icemaker Read the warnings contained in this booklet carefully as they give important information regarding safety Please retain this booklet for any further reference that may be necessary CONTENTS PAGE SPECIFICATIONS 1 1 85 1 Ct 2 1 iS Eas ane 2 Il GENERAL INFORMATION 3 1 5 3 CLAN NA Eu uui 3 b ICEMAKING COMPARTMENT 4 2 SEQUENCE OF 5 a ONE MINUTE FILL 5 b INITIAL HARVEST CYCLE 5 c FREEZE CYCLE 5 9
8. 2950 4 2980 i i I Z A LA 450 apog 3 5 59505 401298 01 4 2950 06 4029 146 5550 i be C i i i i i Gates 0 5 Q apog ueilixnv Jo gt 2550 lt 2 13A WesBolg YOLOW MOSS3udWOo YOLSINYIHL HOLIMS YIMOd eel 40 oes os g o 9 eye 2 6 sesuas 1ojsiuueu 319A9 1S3AHVH 13421 10 U ul aas 06 g 2 6 s su s Jorsiuueu 1 31942 1S3 HVH 31949 3Z3333 rina 319A9 LS3ASVH Trina TOAD LS3AHVH 31949 323395 ONIGNTONI 37949 154 4 379049 323395 310AO 1S3AHVH 31949 323344 319A9 LSJAYYH SWVN Lavd VSZL W q 25 IV SERVICE DIAGNOSIS 1 10 MINUTE DIAGNOSTIC PROCEDURE The 10 minute check out procedure is basically a sequence check which can be used at unit start up or for system diagnosis Using this check out procedure will allow you to diagnose electrical system and component failures in approximately 10 minutes under normal operating conditions of 21 C or warmer air and 10 C or warmer water temperatures Before conducting a 10 minute checkout check for correct installation proper voltage per unit nameplate and adequate water supply As you go through th
9. When 50 F 10 C is reached 3 9 signal causes the control board to de energize the pump motor for 10 seconds and energize it for 50 seconds repeatedly When 34 F 1 C is reached a 5 9 signal causes the control board to de energize the pump motor for 10 seconds energize it for 50 seconds de energize it again for 10 seconds then energize it continuously 22 Dip Switch Selling Control No 6 Activated Ver 2 0 o Anti Slush Control S2 dip switch 6 Program Ver 3 2 Do not adjust This must be left in the factory default position or the unit will not operate properly When activated Ver 1 1 the thermistor located on the suction line checks for a 41 F 5 C temperature as the evaporator cools When 41 F 5 C is reached a 4 8 signal causes the control board to de energize the pump motor for 10 seconds When activated Ver 2 0 the thermistor located on the suction line checks for a 50 F 10 C temperature as the evaporator cools When 50 F 10 C is reached a 3 9 kO signal causes the control board to de energize the pump motor for 10 seconds and energize it for 50 seconds repeatedly When 34 F 1 C is reached 5 9 signal causes the control board to de energize the pump motor for 10 seconds energize it for 50 seconds de energize it again for 10 seconds then energize it continuously S2 Dip swith SelUng celis Control No6 No 6 Activated Ver
10. 1 1 Activated Ver 2 0 d CONTROL BOARD CHECK PROCEDURE Before replacing a control board that does not show a visible defect and that you suspect is bad always conduct the following check procedure This procedure will help you verify your diagnosis 1 Check the dip switch settings to assure that S1 dip switch 3 4 7 8 9 amp 10 and S2 dip switch 1 through 6 are in the factory default position S1 dip switch 1 2 5 amp 6 are cleaning adjustments and the settings are flexible 17 2 Move the control switch to the ICE position and check for proper control voltage If the POWER LED is on the control voltage is good If the POWER OK LED is off check the control transformer circuit If no voltage is present check the power supply circuit 3 To perform a relay sequence test turn on the power switch while pressing the OUTPUT TEST button The correct lighting sequence should be 5 6 7 8 4 Some components e g the compressor will cycle during test Each LED comes on for 5 seconds LED 5 is on while LED 6 is on Following the output test sequence the icemaker will resume normal operation beginning with the 1 minute fill cycle e CONTROL BOARD REPLACEMENT The dip switches should be adjusted to the factory default settings as outlined in this manual 4 HARVEST CONTROL THERMISTOR A thermistor semiconductor is used as a harvest control sensor and anti slush sensor The resistance varies
11. Tube and remove the Spray Tube from the Evaporator Bracket 5 Remove the Front Separator by pushing the Pins inserted into both sides of the Evaporator Bracket toward the center See Fig 18 Note Be careful not to break the Pins 6 The Rear Separator is hooked on the groove in the Evaporator Bracket Remove the Rear Separator by lifting it up and down See Fig 18 7 Refit the Separators in the reverse order of the removal procedure Check that the Separators are fit correctly and can swing like a pendulum 8 Plug in the icemaker or connect the power source Top Cover Front Cover iili Spray Tube Silicone Hose Rear Separator Front Separator Pin Fig 18 53 18 SPRAY TUBE WATER SUPPLY PIPE SPRAY GUIDE 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel 3 Remove the Top Cover 4 Remove the Silicone Hose and Spray Tube See Fig 19 5 Remove the Water Spray Pipe and Spray Guide from the Evaporator Plate See Fig 19 6 Refit the removed parts in the reverse order of the removal procedure Check for water leaks IMPORTANT Fit the Spray Guide securely and tightly on the Evaporator fin Otherwise cloudy or irregular ice cubes or performance reduction may be caused 7 Plug in the icemaker or connect the power source Silicone Hose Spray Tube Spray Gui
12. Vacuum Pump and attach a Refrigerant Charging Cylinder Remember to loosen the connection and purge the air from the Hose See the Nameplate for the required refrigerant charge 6 Open the Low side Valve Do not invert the Charging Cylinder A liquid charge will damage the Compressor 7 Turn on the icemaker when charging speed gets slow Turn off the icemaker when the Low side Gauge shows approximately 0 kg cm Do not run the icemaker at vacuum pressures Close the Low side Valve when the Charging Cylinder gets empty 35 8 Repeat steps 4 through 7 if necessary until the required amount of refrigerant has entered the system 9 Close the Refrigerant Access Valve and disconnect the Hoses Service Manifold etc 10 Cap the Access Valve to prevent possible leak Depressed Cap Access Valve OPEN Fig 3 2 BRAZING DANGER Refrigerant R404A itself is not explosive or poisonous However when exposed to high temperatures open flames R404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous Always recover the refrigerant and store it in a proper container Do not discharge the refrigerant into the atmosphere Do not use silver alloy or copper alloy containing Arsenic Do not use R404A as a mixture with pressurized air for leak testing Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using
13. an electronic leak detector Note All brazing connections inside the bin are clear coated Sandpaper the brazing connections before unbrazing the components Use a good abrasive cloth to remove the coating 36 3 COMPRESSOR WARNING The Compressor Terminal Cover must be refitted in its correct position Otherwise operation under high temperature and high humidity conditions may cause electric shock fire or corrosion to shorten the service life IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened Do not replace the Drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel and Rear Panel 3 Recover the refrigerant and store it in a proper container if required by an applicable law see 1 b REFRIGERANT RECOVERY 4 Remove the Terminal Cover on the Compressor and disconnect Solderless Terminals 5 Disconnect the Discharge and Suction Pipes using brazing equipment 6 Remove the Hold down Bolts Washers and Rubber Grommets 7 Slide and remove the Compressor Unpack the new Compressor package 8 Attach the Rubber Grommets of the previous Compressor 9 Clean the Suction and Discharge Pipes with an abrasive cloth paper 10 Place the Compressor in position and secure it using the Bolts and Washers 11 Remove Plugs from the Compressor Suction and Discharge Pipes 12
14. bin control is activated the POWER OK LED flashes Legend Comp compressor DV drain valve FMS self contained fan motor F S float switch HGV hot gas valve PM pump motor WV inlet water valve Jo eJodeA ay jo pis no pue episul ey 1e4 o 1 zi lues pue aena pesn si siu A A JEJEM 1S UI AAN pue 1olouu p i ddns si 1 uonisod A3M35 u1 u peae d 51 uos ouo eu u uAA duund IN d uonisod 32IAN3S SI quodis ouo usum pezibieu3 sqjueuoduio 586 JOU AGH YOUMs 120 9 4 JOJOLW UB paurejuoo J es S SABA Jossejduo2 duo5 1 IIl SINUILU 01 sunya 2 pue sdojs 1 uado 1 S 3 S 4 uedo S 33 peziB1eue ep SIN 011840 2 pezibjeue ADH peziBJeue ep ADH 10 X 66 pezifieue ep pezifieus uonejedo pezibieue sis duc i ESI senuquoo AM uedo sj4 9 senuliuo o duio5 epo senuljuo Wd pezifjeue ep AM i peziBieue ADH p zIB1 u p Wd z 13 dwog pezifileue Wd pezifieus duio5 peziBieua AM Aejap puooas yaya 6 4 x08uo 8 4 Hu peso s 4 4 pasop s d i 59 DL JO OC yopms 2 2 seuoee PRENNE nu D Di dip LS 988 OZ OL 10 duu 1ojsiueu Puree ul Jo siullau s
15. in normal operation a continuous refrigerant leak will eventually lower the low side pressure below the atmospheric pressure and will cause air suction Air contains a large amount of moisture ester oil easily absorbs a lot of moisture If ice maker charged with R404A has possibly drawn in air the drier must be replaced Be sure to use a drier designed for R404A 3 Handling of Handy Flux R404A Repair of the refrigerant circuit requires brazing It is no problem to use the same handy flux that has been used for the current refrigerants However its entrance into the refrigerant circuit should be avoided as much as possible 4 Oil for Processing of Copper Tubing R404A When processing the copper tubing for service wipe off oil if any used by using alcohol or the like Do not use too much oil or let it into the tubing as wax contained in the oil will clog the capillary tubing 5 Service Parts for R404A Some parts used for refrigerants other than R404A are similar to those for R404A But never use any parts unless they are specified for R404A because their endurance against the refrigerant have not been evaluated Also for R404A do not use any parts that have been used for other refrigerants Otherwise wax and chlorine remaining on the parts may adversely affect R404A 6 Replacement Copper Tubing R404A The copper tubes currently in use are suitable for R404A But do not use them if oily inside The residual oi
16. l uu 10 DRAIN VALVE 1 Unplug the icemaker or disconnect the power source 2 Close the water supply tap 3 Remove the Top Panel Rear Panel and Side Panel R 4 Disconnect the Tab Terminals 5 Remove the Hose Clamps at the inlet and outlet sides 6 Remove the Rubber Hoses at the inlet and outlet sides 7 Remove the two mounting screws 8 Install the new valve in the reverse order of the removal procedure 9 Open the water supply tap 10 Plug in the icemaker or connect the power source 11 Check for leaks 12 Refit the panels in their correct positions Mounting Screw Drain Valve 45 11 FLOAT SWITCH 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panel R 3 Disconnect the Connector of the Float Switch lead 4 Remove the two mounting screws 5 Install the new Float Switch in the reverse order of the removal procedure 6 Refit the panels in their correct positions 7 Plug in the icemaker or connect the power source off Float Switch 46 12 BIN CONTROL SWITCH 1 Remove the Water Tank see 15 WATER The Bin Control Switch is located as shown below when viewed from the front Bin Control Switch Fig 12 2 Remove the Top Panel and the Rear Panel 3 Disconnect the Connector of the Bin Control Switch lead black covered with a silicone hose and remove the lead wire from the Grommet 4 Loosen the Th
17. overcharged 5 Refrigerant line or components plugged Protector replace or undercharged d Starter 2 Coil winding opened e Start Capacitor 1 Defective f Power Relay 1 Bad contacts 1 Check for continuity and replace 2 Coil winding opened g Compressor 1 Wiring to Compressor 1 Check for loose connection or open and replace 2 Defective 3 Protector tripped verify cause h Control Board 1 Defective 1 See Il 3 d CONTROL BOARD CHECK PROCEDURE Filter dust 4 Water a Inlet Water Valve 1 Diaphragm does not 1 Check for water leaks continues to close with icemaker off be supplied in Replace if necessary freeze cycle b Control Board 1 Defective 1 See Il 3 d CONTROL BOARD CHECK PROCEDURE 29 5 No water a Water Supply Line 1 Water pressure too low 1 Check and get comes from and water level in Water recommended pressure Spray Tubes Tank too low Water Pump b Inlet Water Valve 1 Dirty mesh filter or 1 Clean will not start or orifice and water level in freeze cycle Water Tank too low short water leaks replace d Pump Motor 1 Motor winding opened 3 Wiring to Pump Motor 3 Check for loose connection or open and replace 4 Defective Capacitor 5 Defective or bound 5 Replace and clean impeller e Control Board 1 Defective 1 See Il 3 d CONTROL PROCEDURE 6 Fan Motor will a Fan Motor not sta
18. the evaporator outlet Dip Switch Setting Time No 2 seconds o or 8 ON OFF 9 OFF ON 120 ON ON 180 c Drain Timer S1 dip switch 3 amp 4 Once every ten freeze cycles the drain valve opens to drain the water tank for the time determined by the drain timer These switches also determine the time to delay completion of a defrost cycle i e the minimum defrost time Do not change this setting or the unit will not operate properly or produce high quality ice Dip Switch Setting Time seconds T1 Time to drain the water tank T2 Harvest timer at drain Drain cycle always occurs on the 2nd harvest after startup Then depending on the drain frequency control setting dip switch 5 amp 6 drain cycle occurs every cycle or every 2nd 5th or 10th cycle d Drain Frequency Control S1 dip switch 5 amp 6 The water tank drains at the frequency set by the drain frequency control The drain frequency control is factory adjusted to drain the water tank every 10 cycles and no adjustment is required However where water quality is bad and the icemaker needs a drain more often the drain frequency can be adjusted as shown in the table below Bs CE Switch E RISE No5 No 6 n 13 e Water Saver Timer S1 dip switch 7 amp 8 The water saver timer allows the water valve to close and the pump motor to circulate water in the tank during the final part of harvest The water val
19. the power source Thermistor Lead Tie After Thermistor Holder is fitted do not pull Thermistor lead Insulation Thermistor Holder Fit right on top of pipe Fill up to slightly above top of recess Fill in shaded area Do not let in air and make a hollow in recess Fig 14 48 14 CONTROL BOX 1 Unplug the icemaker or disconnect the power source 2 Remove the Louver 3 Remove the two mounting screws and pull the Control Box toward you 4 Refit the removed parts in the reverse order of the removal procedure Note After replacing the components inside the Control Box connect and tie the wires properly in their correct position Especially make sure that the Harness does not press the Push Buttons on the Control Board Power Relay Transformer Power Switch Fuse Fuse Holder Fig 15 49 a POWER SWITCH 1 Disconnect the Tab Terminals and remove the Nut securing the Power Switch 2 Install the new Switch in the reverse order of the removal procedure 3 To prevent miswiring check the terminal numbers and lead wire colors with the Wiring Label b FUSE 1 Use a phillips head screwdriver to remove the Fuse Holder Cap and take out the Fuse 2 Install the new Fuse in the reverse order of the removal procedure c FUSE HOLDER 1 Disconnect the Tab Terminal and remove the Nut securing the Fuse Holder 2 Install the new Fuse Holder in the reverse order of the removal procedure d CONT
20. will not operate properly The KM 100A and KM 125A do not refill i Anti Slush Control S2 dip switch 5 amp 6 Program Ver 2 5 or earlier Do not adjust These must be left in the factory default position or the unit will not operate properly The anti slush control Ver 1 0 Ver 2 0 helps prevent slushing during the freeze cycle on small icemakers It is deactivated on the KM 100A and KM 125A When activated Ver 1 0 the thermistor located on the suction line checks for a 34 F 1 C temperature as the evaporator cools When 34 F 1 C is reached a 5 9 signal causes the control board to de energize the pump motor for 10 seconds When activated Ver 2 0 the thermistor located on the suction line checks for a 50 F 10 C temperature as the evaporator cools When 50 F 10 C is reached a 3 9 signal causes the control board to de energize the pump motor for 10 seconds and energize it for 50 seconds repeatedly When 34 F 1 C is reached a 5 9 kQ signal causes the control board to de energize the pump motor for 10 seconds energize it for 50 seconds de energize it again for 10 seconds then energize it continuously 52 Dip Switen Selling A i eh Control Activated Ver 1 0 Ver 1 0 Activated Ver 2 0 Control Board P01771 02 j Harvest Promotion Control S2 dip switch 2 Program Ver 3 1 Ver 3 2 Do not adjust This must be left in the factory default position or the unit will not opera
21. 4 m AT 10 C WT 10 C WATER CONSUMPTION PER 24h Approx 0 22 m AT 21 C WT 15 C Approx 0 11 m AT 32 C WT 21 C SHAPE OF ICE Crescent Cube FREEZE CYCLE TIME Approx 26 min AT 21 C WT 15 C ICE PRODUCTION PER CYCLE Approx 1 7 kg 182 pcs AT 21 C WT 15 C MAX STORAGE CAPACITY Approx 45 kg Bin Cont Setting Approx 35 kg DIMENSIONS 610mm W X 712mm D X 840mm H 152mm Leg EXTERIOR Stainless Steel Plastic Door Galvanized Steel Rear INSULATION Polyurethane Foam CONNECTIONS ELECTRIC X type Connection With Plug WATER SUPPLY Inlet G1 2 connected at rear side DRAIN Outlet G3 4 connected at rear side ICE MAKING SYSTEM Vertical Evaporator with water flow on both sides COMPRESSOR Hermetic Model SC10DL Danfoss CONDENSER Air cooled Fin and Tube type HEAT REJECTION 1250W 1075kcal h AT 32 C WT 21 C EVAPORATOR Vertical type Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A 340g ICE MAKING CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water Thermistor and Timer ICE MAKING WATER CONTROL SYSTEM Timer Controlled Overflow Pipe BIN CONTROL SYSTEM Mechanical Bin Switch ELECTRICAL PROTECTION Class Appliance 5A Fuse CONT BOARD CIRCUIT PROTECTION High Voltage Cut out COMPRESSOR PROTECTION Auto reset Overload Protector Internal REFRIGERANT CIRCUIT PROTECTION Auto reset High Pressure Control Switch LOW WATER PROTECTION Float Sw
22. 5 1 10 MINUTE DIAGNOSTIC PROCEDURE 26 2 NOICE PRODUCTION u l sss 28 3 EVAPORATOR IS FROZEN UP uu usss 31 Ae LON ICE PRODUCT ON lll nere iii i 32 a era 32 6 OTHER aa eed 33 V REMOVAL AND REPIEACEMENT neon nennen 34 1 SERVICE FOR REFRIGERANT LINES TY 34 a SERVICE INFORMATION 34 b REFRIGERANT 35 c EVACUATION AND RECHARGE 35 2 BRAZING 36 3 COMPRESSSR S 37 Hi ee ullu uu 2 38 HOT GAS VALY 39 6 EXPANSION VALVE ett 40 T FAN MOTOR mee 42 BL PUMP 2 L 43 g WATER VALV ta M 44 10 DRAIN VAL VB a 45 VICEEOAT l ee 46 12 BIN CONTROL SWITCH recaen aa 47 19 THERMISTOR ts eee 48 CONTROL BOK mca 49 POWER 50 6 SP ua ii 50 FC FUSE HOLDER 50 d CONTROL BOARD ec 50 POWER RELAY l 12342 adea
23. BOARD LAYOUT H Control Board Relay LEDs 6 Connector K7 indicate which relays Transformer are energized as listed below LED 5 X1 Relay Compressor Comp Remote Fan Motor FMR LED 6 X2 Relay Hot Gas Valve HGV Self Contained Fan Motor FMS FMS off when LED on Connector K3 Magnetic Contactor Connector K4 Open LED 8 4 Relay Inlet Water Valve WV Harvest Water Valve HWV on units with two inlet water valves POWER OK LED Lights when power is supplied to the board Flashes when bin control is activated LED 9 X5 Relay Freeze Water Valve FWV on units with two inlet water valves service board only Connector K5 Pins 1 Fan Motor 2 Hot Gas Valve 3 Pump Motor 4 Water Valve 5 Open 6 Drain Valve 0080000000 2 K1 I N j LED 4 X6 Relay Drain Valve DV LED 7 X3 Relay Connector K6 Pump Motor PM Open Connector K8 Open i Output Test Button N Woooooooooomwooooco d to test rel OEIL ELE f LLL DL iron est relays on 1 Pins 1 3 Float Switch 2 Open 4 5 Bin Control 6 7 Thermistor 48 9 Open 10 11 16 K2 Alarm Buzzer 51 Dip Switch 52 Dip Switch Alarm Reset Button pen Control Board Auxiliary Code VO or Earlier V1 or Later art Number P0001 3 02 P01771 02 ype HKM2006V003 b FEATURES a Maximum Water Supply
24. Period 6 minutes The inlet water valve will be open during harvest for 6 minutes or the length of harvest minus 0 10 30 or 50 seconds adjustable by S1 dip switch 7 amp 8 whichever is shorter b Harvest Backup Timer and Freeze Timer The harvest backup timer shuts down the icemaker if for two cycles in a row the harvest cycle takes more than 20 minutes to complete The control board will signal this problem using 2 beeps every 3 seconds The freeze timer shuts down the icemaker if for two cycles in a row the freeze cycle takes longer than the time specified to complete The control board will signal this problem using 3 beeps every 3 seconds The time is factory set using S1 dip switch 9 amp 10 The alarm reset button on the control board must be pressed with power on to reset either of these safeties c High Temperature Safety The temperature of the suction line in the refrigeration circuit is limited by the high temperature safety This protects the unit from excessively high temperatures If the evaporator temperature rises above 53 C 4 C the thermistor operates the safety This shuts down the circuit and the icemaker automatically stops The control board will signal this problem using 1 beep every 3 seconds The alarm reset button on the control board must be pressed with power on to reset the safety d Low Water Safety The control board checks the position of the float switch at the end of the initial one minu
25. RMER PCH 23 350 NO 9X AV138 440 NO X AV138 34O Wd QHVO8 1 4 0 Wd AH ZzX AV139 340 NO LX AV IH 3 0 HOLIMS NO 1 295 06 295 6 3 0 NO HOLIMS 1VO13 a E NO SATA ONINVATO i i 440 X HO 995 01 988 0 2555 4 umum 8801 Siva walvm 9 XEN ia XEN lt 9 Xe 4 uju 9 xen gt 3 9 xen i H i aida l 1 1 T 1 10 E A 4 0 poO ueipxny i NO 1 le 10 toi i 98s 0 0 29506 29506 295 0 4 29506 98s 0 4 59506 295 0 4 4 29506 Z 33A I A fue lt o so N 295 06 40 29501 NO 29506 40 295 01 4 gt 29806 i uamea 10 0 A 440 ueyxny 9lpe jo lt 28s0 S Z tueI6oid YOLOW dWnd YOLOW NOSS3HdWOO MOLSIWH3HL HOLIMS H3MOd Jo 48 9p o jseAreu u oos og g Ol 9 eye 0 6 sosuos 319A9 1S3AHVH V 49 yseniey ul oos OF ultu g ind s314v
26. ROL BOARD 1 Disconnect all the Connectors 2 Pull the Tab to release the Control Board 3 Lift off the Control Board 4 To refit the Control Board fit its four corner holes on the positioning lugs inside the Control Box and secure the Control Board with the Tab 5 Check the Dip Switch for proper setting 6 When reconnecting the Connectors do not push them too hard The Control Board may be damaged e POWER RELAY 1 Disconnect the Tab Terminals remove the mounting screw and lift off the Power Relay from the fit at the bottom 50 2 Install the new Relay in the reverse order of the removal procedure 3 To prevent miswiring check the terminal numbers and lead wire colors with the Wiring Label f CONTROL BOARD TRANSFORMER 1 Disconnect the Connectors and Closed End Connectors connecting the Control Board The Tie securing the harness may be removed But be careful not to break the lead wires 2 Remove the mounting screw and lift off the Transformer from the fit at the bottom 3 Install the new Transformer in the reverse order of the removal procedure 15 WATER TANK 1 Drain out the Water Tank by leaving the Control Switch in the SERVICE position and the Service Switch in the DRAIN position for several tens of seconds 2 Unplug the icemaker or disconnect the power source Remove all ice from the Storage Bin 3 Disconnect the Overflow Pipe 4 Remove the two Thumbscrews Pull the Water Tank sligh
27. TXV not feeding properly low Timer is factory set using charge or inefficient Comp S1 dip switch 9 amp 10 To reset the above safeties press the ALARM RESET button with the power supply on 11 Low Voltage POWER OK LED will turn off if voltage 184Vac 5 or less protection operates 7 High Voltage The control voltage safeties automaticlly 294Vac 5 or more reset when voltage is corrected Legend Comp compressor DV drain valve FMS self contained fan motor HGV hot gas valve PM pump motor TXV thermostatic expansion valve WRV water regulating valve WV inlet water valve c CONTROLS AND ADJUSTMENTS a Default Dip Switch Settings The dip switch is factory adjusted to the following positions S1 Dip SwitchNo 1 2 3 4 5 6 7 98 9 10 Rem e h 2 5 or earlier V 0 or earlier 3 1 V 1 V 2 3 2 V 3 or later Do not adjust the S2 dip switch These must be left in the factory default position or the unit will not operate properly S1 Dip Switch S2 Dip Switch Freeze Timer 9 amp 10 Water Saver Timer 7 amp 8 Drain Frequency Control 5 amp 6 Drain Timer 3 amp 4 Functions of S2 dip switch nos 2 Harvest Timer 1 amp 2 through 6 depend on program version Fig 1 b Harvest Timer S1 dip switch 1 amp 2 Used for adjustment of the harvest timer The harvest timer starts counting when the 12 thermistor reads a certain temperature at
28. also wash the bin liner and Bracket L R with the solution 18 Discard the cleaning solution and rinse the parts thoroughly with water b SANITIZING PROCEDURE Following Cleaning Procedure 1 Dilute approximately 15 ml or 1 tbs of a 5 25 sodium hypochlorite solution chlorine bleach with 3 8 lit of warm water Using a chlorine test strip or other method confirm that you have a concentration of about 200 ppm 2 Soak the removed parts from step 17 above in a clean container containing the sanitizing solution After allowing the parts to soak for 10 minutes wash them with the solution Also wash the bin liner Bracket L R with the solution 3 Discard the sanitizing solution and rinse the parts thoroughly with water 4 Replace the removed parts in their correct positions in the reverse order of which 57 they were removed 5 Same as step 1 6 Pour the sanitizing solution into the Water Tank and allow the sanitizer to sit for 10 minutes 7 Move the Control Switch to the SERVICE position and the Service Switch to the WASH position 8 After 15 minutes move the Control Switch to the OFF position 9 Move the Control Switch to the SERVICE position and the Service Switch to the DRAIN position 10 After 2 minutes move the Control Switch to the OFF position 11 Repeat steps 5 through 10 one time Repeat steps 9 through 12 in the Cleaning Procedure three times to rinse thoroughly
29. c EVACUATION AND RECHARGE 11 Attach the Bulb to the suction line in position Be sure to secure it using a wire or clamp and replace the insulation 12 Refit the panels in their correct positions 13 Plug in the icemaker or connect the power source WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 115 C Cut ties to make Bulb removable Bulb Bulb Insulation Hose Remove Expansion Expansion Valve Valve Cover first Fig 5 41 7 FAN MOTOR 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panel L 3 Disconnect the Connector of the Fan Motor lead 4 Remove the four screws securing the Fan Motor Bracket and pull out the Fan Motor in the arrow direction To prevent deformation do not hit the Fan on the Condenser or other parts 5 Install the new Fan Motor in the reverse order of the removal procedure 6 Refit the panels in their correct positions 7 Plug in the icemaker or connect the power source Screw Fan Motor Fan Motor Bracket 42 8 PUMP MOTOR 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panel R 3 Disconnect the Connector of the Pump Motor lead 4 Remove the Water Tank see 15 WATER 5 Remove the Hose Band connecting the Pump Motor discharge outlet and pull o
30. de Water Spray Pipe 19 DOOR 1 Open the Door 2 Unscrew and remove the Hinges on both sides and remove the Door 3 Refit the removed parts in the reverse order of the removal procedure Check that the Door opens and closes smoothly Door 55 VI CLEANING AND MAINTENANCE INSTRUCTIONS IMPORTANT Ensure all components fasteners and screws are securely in place after any maintenance or cleaning is done to the equipment 1 CLEANING WARNING Hoshizaki recommends cleaning this unit at least once a year More frequent cleaning however may be required in some existing water conditions To prevent injury to individuals and damage to the icemaker do not use ammonia type cleaners Always wear liquid proof gloves to prevent the cleaning and sanitizing solutions from coming into contact with skin For safety and maximum effectiveness use cleaning and sanitizing solutions immediately after dilution a CLEANING PROCEDURE 1 Dilute 148 ml of recommended cleaner Hoshizaki Scale Away or LIME A WAY Economics Laboratory Inc with 3 8 lit of water 2 Remove the Louver Open the Door and remove all ice from the Evaporator and the Storage Bin Note To remove cubes on the Evaporator move the Control Switch on the Control Box to the OFF position and move it back to the ICE position after 3 minutes The defrost cycle starts and the cubes will be removed from the Evapo
31. depending on the suction line temperatures The thermistor detects the temperature of the evaporator outlet to start the harvest timer or momentarily stop the pump motor during the freeze cycle No adjustment is required If necessary check for resistance between thermistor leads and visually check the thermistor mounting located on the suction line next to the evaporator outlet 0 8 1 1441 32 10 1 600 3 871 2 474 9 92 1 633 Check a thermistor for resistance by using the following procedure 1 Disconnect the connector K1 on the board 2 Remove the thermistor See V 13 THERMISTOR 3 Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes 4 Check for resistance between the thermistor leads Normal reading is within 3 5 to 7 Replace the thermistor if it exceeds the normal reading 18 5 BIN CONTROL This machine uses a lever actuated proximity switch mechanical bin control to control the ice level in the storage bin No adjustment is required a EXPLANATION OF OPERATION The bin control is connected to the K1 connector pins 4 amp 5 on the control board When the bin control is calling for ice proximity switch closed POWER OK LED on the control board continues icemaking operations When the bin control is activated in the bin full position proximity switch open POWER OK LED flashing the control board drains and shuts down the unit However
32. e actuator in The POWER OK LED should flash and the machine should turn off If not replace the control board 19 6 SWITCHES Two different control switches are used for operation of KM 100A and KM 125A They are located on the right side of the control box which becomes accessible when the front louver is removed The upper is the control switch and the lower is the service switch a CONTROL SWITCH This switch is used to place the machine into one of three modes OFF center position ICE upper position and SERVICE lower position b SERVICE SWITCH When the control switch is placed in the SERVICE position power is supplied to the service switch The service switch can be used to perform two functions draining the tank DRAIN lower position and washing the icemaking compartment WASH or CIRCULATE upper or center position Both the WASH and CIRCULATE positions activate the same function of washing the icemaking compartment The service switch is activated in any of the three positions when the power is supplied to the pump motor 1 DRAIN KM 100A and KM 125A employ the pump out drain system When the service switch is active and placed in the lower position power is supplied to the pump motor and drain valve 2 WASH or CIRCULATE When the service switch is active and placed in the upper or center position power is supplied to the pump mo
33. e procedure check to assure the components energize and de energize correctly If not those components and controls are suspect 1 Turn power off and access the control box Clear any ice from the bin control actuator located in the bin 2 Turn power on and place the control switch the ICE position 5 second delay occurs The POWER OK LED on the control board comes on If the POWER OK LED is flashing indicating a full bin check the bin control See Il 5 b BIN CONTROL CHECK PROCEDURE 3 One Minute Fill Cycle The inlet water valve is energized After 1 minute the control board checks the float switch If the float switch is closed the unit cycles to harvest If closed continue to step 4 If the float switch is open the unit repeats the 1 minute fill cycle until water enters and the float switch closes low water safety protection during initial start up and at the end of each harvest Diagnosis If the water valve does not open check for no supply voltage at water valve terminals bad coil or plugged screen or external filter no water flow If unit fails to start harvest check for open float switch or bad 1 minute timer in board 4 Initial Harvest Cycle The inlet water valve remains energized contactor coil energizes to start the compressor and fan motor on a remote condenser unit and the hot gas valve energizes The evaporator warms and the thermistor senses 48 F 9 C The control board then rece
34. e Bin The Storage Bin should be cleaned and dried Drain the icemaker using air or carbon dioxide to prevent damage to the water supply lines at sub freezing temperatures Shut off the icemaker until the proper ambient temperature is resumed When the icemaker is not used for two or three days it is sufficient to only move the Control Switch to the OFF position unless the icemaker will be at sub freezing temperatures a Remove the water from the potable water supply line 1 Remove the Louver if it has not already been removed 2 Move the Control Switch on the Control Box to the OFF position See Fig 2 3 Wait 3 minutes 4 Close the potable water supply line Stop Valve See Fig 21 5 Remove the Inlet Hose b Drain the potable Water Tank 1 Move the Control Switch to the SERVICE position and the Service Switch to the 59 DRAIN position 2 After 2 minutes move the Control Switch to the OFF position 3 Open the Door Remove all ice from the Storage Bin and clean the Storage Bin 4 Close the Door 5 Replace the Louver in its correct position 6 Turn off the power supply at the breaker box Inlet Hose Washer Stop Valve 60
35. e production d DRAIN CYCLE LEDs 4 5 6 and 7 on Comp continues to run HGV opens and FMS de energizes PM stops for 2 seconds DV energizes then restarts to take water from the sump and force it through DV and down the drain When the drain timer stops counting the drain is complete The drain timer has settings of 10 and 20 seconds S1 dip switch 3 amp 4 Drain cycle always occurs on the 2nd harvest after startup Then depending on the control board setting drain cycle occurs every cycle or every 2nd 5th or 10th cycle S1 dip switch 5 6 e NORMAL HARVEST CYCLE LEDs 5 6 and 8 are on Comp continues to run HGV remains open and WV opens As the evaporator warms the thermistor reaches 9 C The control board then receives the thermistor s 3 9 signal and starts the harvest timer WV is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 10 30 or 50 seconds adjustable by S1 dip switch 7 amp 8 whichever is shorter LED 8 goes off when WV closes PM energizes and runs for the last 0 10 30 or 50 seconds of harvest depending on 51 dip switch 7 amp 8 setting LED 7 comes on when PM energizes At the end of harvest the control board checks the position of F S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fill if it is open The unit continues to cycle through c d and e sequence until the bin control is activated and shuts the unit down When the
36. ff the Rubber Hose Rubber Hose Pull off Fig 7 6 Remove the screws securing the Pump Motor and llift it off gt gt Cc 2 cal 9 o Fig 8 7 Install the new motor in the reverse order of the removal procedure 8 Refit the Water Tank in its correct position 9 Plug in the icemaker or connect the power source and check for leaks 10 Refit the panels in their correct positions 43 9 WATER VALVE 1 Unplug the icema 2 Close the water s ker or disconnect the power source upply tap 3 Remove the Top Panel Rear Panel and Side Panel R 4 Disconnect the Tab Terminals 5 Pinch and lower the Hose Clamp 6 Disconnect the Rubber Hose from the Water Valve Put a towel under the Water Valve to receive water coming out 7 Turn the Inlet Nut in the arrow direction to remove it from the Water Valve Do not lose the Gasket inside 8 Remove the two mounting screws 9 Install the new valve in the reverse order of the removal procedure 10 Tighten the Inlet Nut to a torque of 7 85 Nem 5 to prevent water leaks 11 Open the water supply tap 12 Plug in the icemaker or connect the power source 13 Check for leaks 14 Refit the panels in their correct positions Rubber Hose Hose Clamp Mounting Screw Tab Terminal Inlet Nut lt NW 7 7 Ke DERE 2 Sa W
37. gu END E E oe b R an BK 9 O 4 4 1 pd QM BR L asl 5 0490 E EUN og c SU 10 AA 2 y 6 oJ 1 EY 220 240 50 1 1 T NT BK 2 P W FAN ig ZI MOTOR 9 WIRE COLOR CODE BR 1 1 WATER EU 2 X A RED c O ORANGE W Y GRAY NOISE a SUPPRESSION Dba m SON CAPACITOR A 4 S GR I G Y GREEN YRLLOW TRANSFORMER PCB 22 b PRODUCTION 2009 Auxiliary Code U 1 OR LATER a FLOAT CONTROLLER POWER RELAY P e m oy r END R aoe 0 wit oiy SWITCH 1 3d SERVICE Bs j ol si BK BR i 1 BIN CONTROL th ef ep SH rv 15 o BR jg eim c 7 Oloy uu of o oo P ne E TERISTR i AM hi 220 240 50 1 1 T T EE 3 3 to BK a I i y y y C 931 FAN DBuio3 K5 GR 8 1 0 C j pasy 105 WIRE COLOR ge CODE BR 7 BK Tm ELM BR BROWN WATER DRAIN KT w shy o BK BLACK E CAP y E RED Sy ted QO ORANGE W ye th rm Te m RI pe eese M mu 111 Magi en V VIOLET k G Y GREEN YELLOW TRANSFO
38. itch ICE MAKER PROTECTION Interlock by Control Board WEIGHT Net weight 62kg Gross weight 75kg PACKAGE Carton 695mm W X 800mm D X 955mm H ACCESSORIES Instruction Manual Scoop Leg 4 pcs Drain Adapter Outlet Hose Duct Screw 3 pcs OPERATION CONDITIONS VOLTAGE RANGE 198 254V AMBIENT TEMP 1 40 WATER SUPPLY 5 35 C WATER SUPPLY PRESS 0 7 8bar 0 07 0 8Mpa We reserve the right to make changes in specifications and design without prior to notice b KM 125A AC SUPPLY VOLTAGE 1 Phase 220 240 50Hz AMPERAGE 4 50 A AT 32 C WT 21 C STARTING AMPERAGE 19 ELECTRICAL CONSUMPTION 774W AT 32 C WT 21 C POWER FACTOR 67 POWER SUPPLY 1 43 KVA 5 9A Approx 128 kg AT 10 C WT 10 C ICE PRODUCTION PER 24h Approx 115 kg AT 21 C WT 15 C Approx 102 kg AT 32 C WT 21 C Approx 0 73 m AT 10 C WT 10 C WATER CONSUMPTION PER 24h Approx 0 40 m AT 21 C WT 15 C Approx 0 18 m AT 32 C WT 21 C SHAPE OF ICE Crescent Cube FREEZE CYCLE TIME Approx 24 Min AT 21 WT 15 ICE PRODUCTION PER CYCLE Approx 2 1 kg 238 pcs AT 21 C WT 15 C MAX STORAGE CAPACITY Approx 55 kg Bin Cont Setting Approx 45 kg DIMENSIONS 762mm W X 712mm D X 840mm H 152mm Leg EXTERIOR Stainless Steel Plastic Door Galvanized Steel Rear INSULATION Polyurethane Foam CONNECTIONS ELECTRIC X type Connection With Plug WATER SUPPLY Inlet G1 2 connected at rear side
39. ives the thermistor s 3 9 signal turns operation of harvest over to the harvest timer The timer completes counting 1 to 3 minutes The unit then cycles to freeze Diagnosis Check if compressor is running hot gas valve is open water valve still open Average harvest cycle at factory setting is 2 to 3 minutes How long does initial harvest last 1 5 minutes after initial harvest begins touch the compressor discharge line Is it hot If not check refrigerant pressures and compressor operation If it is hot touch the inlet line to the evaporator Is it hot If it is hot and the freeze cycle is not starting check the harvest timer adjustment the thermistor for open circuit the discharge line temperature compressor efficiency and if the hot gas valve is fully open 5 Freeze Cycle The compressor remains energized pump motor line valve if applicable and fan motor energize The inlet water valve and hot gas valve de energize The unit is held in freeze by a 5 minute short cycle protection timer which 26 starts after the thermistor temperature reaches 2 C After this period the freeze cycle operation is transferred to the float switch for freeze termination During the first 5 minutes of freeze confirm that the evaporator temperature drops After the minimum freeze period disconnect the float switch at the 2 pin connector attached to the red wires The unit should immediately switch to the drain cycle Diagnosis If the e
40. l in copper tubes should be as little as possible Low residual oil 34 type copper tubes are used in the shipped units 7 Evacuation Vacuum Pump and Refrigerant Charge R404A Never allow the oil in the vacuum pump to flow backward The vacuum level and vacuum pump may be the same as those for the current refrigerants However the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for R404A 8 Refrigerant Leak Check Refrigerant leaks can be detected by charging the unit with a little refrigerant raising the pressure with nitrogen and using an electronic detector Do not use air or oxygen instead of nitrogen for this purpose or rise in pressure as well as in temperature may cause R404A to suddenly react with oxygen and explode Be sure to use nitrogen to prevent explosion b REFRIGERANT RECOVERY No refrigerant Access Valve is provided in the unit Install a proper Access Valve on the low side line ex Compressor Process Pipe Recover the refrigerant from the Access Valve and store it in a proper container Do not discharge the refrigerant into the atmosphere c EVACUATION AND RECHARGE 1 Attach Charging Hoses a Service Manifold and a Vacuum Pump to the system 2 Turn on the Vacuum Pump 3 Allow the Vacuum Pump to pull down to a 760 mmHg vacuum Evacuating period depends on the pump capacity 4 Close the Low side Valve on the Service Manifold 5 Disconnect the
41. nd charge it with refrigerant see 1 c EVACUATION AND RECHARGE 11 Attach the Solenoid Coil to the valve body and secure it with the screw 12 Connect the lead wires 13 Refit the panels in their correct positions 14 Plug in the icemaker or connect the power source 6 EXPANSION VALVE IMPORTANT The water in the refrigeration circuit may exceed the capacity of the Drier and freeze in the Expansion Valve Always install a new Drier every time the sealed refrigeration system is opened Do not replace the Drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panel R 3 Recover the refrigerant and store it in proper container if required by an applicable law see 1 b REFRIGERANT RECOVERY 4 Remove the Expansion Valve using brazing equipment Protect the Evaporator and pipes from excessive heat with damp cloths or similar 5 Remove the Insulation Hose from the Expansion Valve Sensor Bulb and remove the Bulb 6 Remove the Drier using brazing equipment 40 7 Braze in the new Expansion Valve Protect the body of the valve from excessive heat and use nitrogen at a pressure of 0 2 0 3 bar when brazing 8 Install the new Drier see 4 DRIER 9 Check for leaks using nitrogen gas 10 bar and soap bubbles 10 Evacuate the system and charge it with refrigerant see 1
42. nt 50 fl CONTROL BOARD 5 51 15 WATER TANK nse 51 16 CUBE GUIDE 52 17 SEPARATOR 52 18 SPRAY TUBE WATER SUPPLY PIPE SPRAY GUIDE 54 19 enn 55 CLEANING AND MAINTENANCE INSTRUCTIONS 56 56 a CLEANING lt LLL 56 D SANITIZING PROCEDURE 57 2 MAINTENANCE a due teo ae 58 a EXTERIOR PANELO r u 58 b STORAGE BIN AND SCOOP Z 58 JAR FILTER 59 CONDEN SER 59 3 PREPARING THE ICEMAKER FOR LONG STORAGE 59 I SPECIFICATIONS 1 SPECIFICATIONS a KM 100A AC SUPPLY VOLTAGE 1 Phase 220 240 50Hz AMPERAGE 3 40 AT 32 C WT 21 C STARTING AMPERAGE 15A ELECTRICAL CONSUMPTION 584W AT 32 C WT 21 C POWER FACTOR 67 POWER SUPPLY 0 96 kVA 4 2A Approx 101 kg AT 10 C WT 10 C ICE PRODUCTION PER 24h Approx 88 AT 21 C WT 15 C Approx 64 kg AT 32 C WT 21 C Approx 0 5
43. o not adjust This must be left in the factory default position or the unit will not operate properly It is deactivated on the KM 100A and KM 125A When activated the thermistor detects the temperature of the evaporator outlet to find overfreeze in a harvest cycle and at the beginning of a freeze cycle If the difference between the maximum temperature after the water saver timer starts counting and the temperature at the end of a harvest cycle is 4K or more and if the temperature at the end of a harvest cycle is 48 F 9 C or less the harvest cycle is extended for 30 seconds If the difference between the temperature at the beginning of a freeze cycle and the minimum temperature after 30 seconds in the freeze cycle is 2 5K or more and less than 3 5K the next harvest cycle is extended for 30 seconds If the above conditions occur in succession the number of occurrence times 30 seconds will be added to the harvest cycle time If the above temperature difference is 3 5K or more the freeze cycle ends after the minimum freeze cycle time and a harvest cycle starts S2 Dip Switch ee F Overfreeze Detection No 5 Control Deactivated Activated 16 n Anti Slush Control S2 dip switch 6 Program Ver 3 1 Do not adjust This must be left in the factory default position or the unit will not operate properly When activated Ver 2 0 the thermistor located on the suction line checks for a 50 F 10 C temperature as the evaporator cools
44. ol board includes LED indicator lights audible alarm safeties and an output test feature The POWER OK LED indicates control voltage and will remain on unless a control voltage problem occurs The POWER LED flashes continuously when the bin is full and DV energizes for a maximum of 5 minutes to drain the water tank At startup a 5 second delay occurs to stabilize the circuit LEDs 4 through 8 energize and sequence from initial startup as listed in the table below Note that the order of the LEDs from the outer edge of the board is 5 6 8 4 7 For more information see 2 SEQUENCE OF OPERATION Sequence Ste LED Energized Time LEDs are On Components 8 60seconds 1 Minute Fill Cycle Harvest Cycle Last 0 10 30 or 50 seconds adjustable by dip switch of harvest WV de energizes and PM energizes LEDs 5 6 and 7 are on Freeze Cycle Lares umer 25 to 30 minutes setting factory default setting Type of Alarm Notes High Evaporator Temp Check for harvest problem stuck HGV or temperature gt 53 C relay hot water entering unit stuck HM or shorted thermistor Harvest Backup Timer Check for open thermistor HGV not harvest gt 20 min for twojopening TXV leaking by low charge cycles in a row inefficient Comp or WRV leaking by Freeze Timer Check for a float switch stuck closed up freeze gt specified settinglWV leaking by HGV leaking by PM not for two cycles in a row pumping
45. rator 3 Move the Control Switch to the OFF position 4 Move the Control Switch to the SERVICE position and the Service Switch to the DRAIN position 5 After 2 minutes move the Control Switch to the OFF position 56 6 Pour the cleaning solution into the Water Tank Move the Control Switch to the SERVICE position and the Service Switch to the WASH position Close the Door 7 After 30 minutes move the Control Switch to the OFF position 8 Same as step 4 9 Move the Control Switch to the ICE position to fill the Water Tank with water 10 After 3 minutes move the Control Switch to the SERVICE position and the Service Switch to the WASH position 11 After 5 minutes move the Control Switch to the OFF position 12 Same as step 4 13 Repeat steps 9 through 12 three more times to rinse thoroughly 14 Disconnect the Overflow Pipe Next remove the Water Tank by removing the two Thumbscrews and pulling the tank towards you slightly and pushing it down Be careful to avoid breakage when handling the parts See Fig 16 15 Pull the Cube Guides quantity varies depending on model upward to remove them from the Water Tank They are snapped in place See Fig 17 16 Same as step 1 17 Wash the Bin Control Switch Water Tank Float Switch Cube Guide and Overflow Pipe by using a nylon scouring pad brushes and the cleaning solution In addition to the removed parts
46. rt or is not operating 3 Wiring to Fan Motor 3 Check for loose connection or open and replace 4 Fan blade bound 4 Check and replace locked Fan Motor b Control Board 1 Defective 1 See Il 3 d CONTROL PROCEDURE 7 All a Refrigerant 1 Check for leaks and components recharge run but no ice 2 Replace Drier and is produced recharge 1 Defective c Hot Gas Solenoid 1 Continues to open in 1 Check and replace Valve freeze cycle 30 3 EVAPORATOR IS FROZEN UP 1 Freeze cycle a Float Switch 1 Leads shorted or 1 Check and replace time is too defective switch long 2 Float does not move 2 Clean or replace freely b Inlet Water Valve 1 Diaphragm does not 1 Check for water leaks close with icemaker off Replace if necessary c Control Board 1 Defective 1 See ll 3 d CONTROL BOARD CHECK tee 2 All ice formed 1 Scaled up 1 Clean does not fall recommended pressure into bin in c Inlet Water Valve 1 E M mesh filter or 1 DL MEI harvest cycle B ME 2 Diaphragm does not 2 ee for water leaks close with icemaker off Replace if necessary d Ambient and or 1 1 Increase mer water temperature attachment THERMISTOR f Control Board 1 Harvest Timer is set too 1 Adjust longer referring to short ll 4 HARVEST CONTROL THERMISTOR 2 Defective 2 See Il 3 d CONTROL BOARD CHECK PROCEDURE 3 Others a Spra
47. ry set for normal conditions The timer has settings of 60 90 120 and 180 seconds S1 dip switch 1 amp 2 When the harvest timer completes its count down the harvest cycle is complete and the freeze cycle starts The minimum total time allowed by the board for a complete harvest cycle is 2 minutes WV is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 10 30 or 50 seconds adjustable by S1 dip switch 7 amp 8 whichever is shorter LED 8 goes off when WV closes PM energizes and runs for the last 0 10 30 or 50 seconds of harvest depending 51 dip switch 7 8 setting LED 7 comes on when PM energizes At the end of harvest the control board checks the position of F S and proceeds to the freeze cycle if it is closed or calls for a 1 minute fill if it is open c FREEZE CYCLE LEDs 5 amp 7 are on Comp continues to run PM and FMS energize HGV closes and the freeze cycle starts For the first 5 minutes after the thermistor temperature reaches 2 C the control board will not accept a signal from F S This minimum freeze period acts as a short cycle protection At the end of this period F S assumes control As the evaporator cools the thermistor located on the suction line checks the temperature and PM stops see Ill 3 TIMING CHART for details This is to prevent slushing As ice builds on the evaporator the water level in the sump lowers The freeze continues until F S opens and terminates ic
48. s using nitrogen gas 10 bar and soap bubbles 8 Evacuate the system and charge it with refrigerant see 1 c EVACUATION AND RECHARGE 9 Refit the panels in their correct positions 10 Plug in the icemaker or connect the power source Note Always use a Drier of the correct capacity and refrigerant type 38 5 HOT GAS VALVE CAUTION To ensure optimum performance use a copper tube of the same diameter and length for replacement of the hot gas circuit IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened Do not replace the Drier until after all other repair or replacement has been made 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panel R 3 Recover the refrigerant and store it in a proper container if required by an applicable law see 1 b REFRIGERANT RECOVERY 4 Disconnect the Hot Gas Valve leads 5 Remove the screw and the Solenoid Coil 6 Remove the valve and Drier using brazing equipment 7 Braze the new Hot Gas Valve with nitrogen gas flowing at a pressure of 0 2 0 3 bar Hot Gas Valve WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating Do not braze with the valve body exceeding 135 C 8 Install the new Drier see 4 DRIER 9 Check for leaks using nitrogen gas 10 bar and soap bubbles 10 Evacuate the system a
49. stall a water filter or contains impurities softener 32 6 OTHER PROBLEM POSSIBLE CAUSE REMEDY 1 Icemaker will a Bin Control Switch 1 Completely 1 Place in position not stop when disconnected and bin is filled with dropped inside bin ice 2 Detector broken 3 Detector out of position 3 Place in position replace position 6 disconnected 6 Place in position Detector b Control Board 1 Defective 1 See Il 3 d CONTROL BOARD CHECK PROCEDURE 2 Abnormal noise 7 Fan Motor 2 Fan blade deiormed 2 Replace Tan blade 3 Fan blade does not 3 Replace move freely c Compressor 1 ee R worn out or 1 C B DE valve broken 2 Mounting pad out of 2 2 position or loose hold down bolt other surfaces 3 Ice in Storage a Bin Drain 1 Plugged 1 Bin often melts 33 V REMOVAL AND REPLACEMENT 1 SERVICE FOR REFRIGERANT LINES a SERVICE INFORMATION 1 Allowable Compressor Opening Time and Prevention of Lubricant Mixture R404A The compressor must not be opened more than 15 minutes in replacement or service Do not mix lubricants of different compressors even if both are charged with the same refrigerant except when they use the same lubricant 2 Treatment for Refrigerant Leak R404A If a refrigerant leak occurs in the low side of an ice maker air may be drawn in Even if the low side pressure is higher than the atmospheric pressure
50. te properly When activated this control promotes harvest of ice on the evaporator that is hard to remove If the harvest cycle exceeds 6 minutes the pump motor starts to operate for a maximum of 3 minutes 52 Dip Switch Setting Harvest Promotion Control k Refill Counter S2 dip switch 3 Program Ver 3 1 Ver 3 2 Do not adjust This must be left in the factory default position or the unit will not operate properly The KM 100A and KM 125A do not refill I Harvest Completion Detection Control S2 dip switch 4 Program Ver 3 1 Ver 3 2 Do not adjust This must be left in the factory default position or the unit will not operate properly It is deactivated on the KM 100A and KM 125A When activated this control determines whether ice remains on the evaporator at the end of a harvest cycle and at the beginning of a freeze cycle If ice drops and activates the bin control switch in the last 10 seconds of a harvest cycle the control determines that ice still remains on the evaporator and extends the harvest cycle for 30 seconds If the bin control switch is activated at the beginning of a freeze cycle the control determines that ice still remains on the evaporator and starts a harvest cycle after the minimum freeze cycle time has passed S2 Dip Switch Setting Harvest Completion 04 Detection Control Deactivated Activated m Overfreeze Detection Control S2 dip switch 5 Program Ver 3 1 Ver 3 2 D
51. te water fill cycle and at the end of each harvest cycle If the float switch is in the up position electrical circuit closed the control board changes to the next cycle If the float switch is in the down position electrical circuit open the control board changes to additional one minute water fill cycles until water enters the sump and the float switch closes When the float switch closes the control board changes to the next cycle The unit will not start without adequate water in the sump This serves as a low water safety to protect the water pump For water cooled model if the condenser water supply is shut off the unit is protected by the high pressure switch e High Voltage and Low Voltage Cut outs The maximum and minimum allowable supply voltages of this icemaker are limited by the high voltage and low voltage cut outs If miswiring especially on single phase 3 wire models causes excessive voltage 294Vac 5 or more on the control board the high voltage cut out shuts down the circuit in 3 10 seconds and the icemaker automatically stops The control board will signal this problem using 7 beeps every 3 seconds The icemaker also automatically stops in cases of insufficient voltage 184Vac 5 or less The control board will signal this problem using 6 beeps every 3 seconds When the proper supply voltage is resumed the icemaker automatically starts running again f LED Lights and Audible Alarm Safeties The contr
52. tly toward you and push it down Be careful to avoid breakage when handling the parts See Fig 16 5 Refit the Water Tank in the reverse order of the removal procedure 6 Plug in the icemaker or connect the power source Water Tank TSSS S555 PESTA c W Overflow Pipe Fig 16 Thumbscrew 51 16 CUBE GUIDE 1 Remove the Water Tank see 15 WATER 2 Lift off the Cube Guide out of the Water Tank 3 To refit the Cube Guide fit the Notches on both sides to the Stoppers in the Water Tank 4 The unit is provided with three or four Cube Guides quantity varies depending on model Be sure to locate the Vertical Flanges on the outside edges Vertical Flange Notch Guide Stopper 17 SEPARATOR IMPORTANT 1 The Front Separator and Rear Separator are attached to the Evaporator Bracket with different lengths of Pins The Front Separator Pins 12 7 mm are longer than the Rear Separator Pins 9 8 mm Do not misplace the Front and Rear Separators Do not attach the Separators upside down or inside out Make sure that the side printed with THIS SIDE UP faces up and the side printed with EVAPORATOR SIDE faces the Evaporator 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel Rear Panel and Side Panels L R 52 3 Remove the Top Cover and Front Cover See Fig 18 4 Disconnect the Silicone Hose from the Spray
53. to prevent incomplete batches of ice from forming on the evaporator the control board will only shut down the machine during the freeze cycle before the five minute timer expires The five minute timer starts counting down when the thermistor temperature reaches 2 C If during the freeze cycle ice pushes in the lever after the five minute timer expires the control board will allow the machine to complete the freeze cycle and the following harvest cycle before shutting down the machine b BINCONTROL CHECK PROCEDURE 1 Clear any ice away from the bin control 2 Make sure the control switch is in the ICE position 3 Check that the POWER OK LED on the control board is on 4 Activate the bin control actuator press the actuator in Check that the POWER OK LED flashes 5 Disconnect the bin control at the 2 pin connector attached to the black wires coming from the K1 connector pins 4 amp 5 on the control board 6 Check for continuity across the bin control leads When calling for ice the bin control proximity switch should be closed If open replace the bin control Activate the bin control actuator press the actuator in check for continuity across the bin control leads The bin control proximity switch should be open If closed replace the bin control 7 Reconnect the 2 pin connector Allow the machine to cycle into the freeze cycle In the first 5 minutes of the freeze cycle activate the bin control actuator press th
54. tor Compressor Water Valve Float Switch Overflow Pipe Control Box Eront View Rear View Bin Control Switch With Tank Removed b ICEMAKING COMPARTMENT Spray Tube Evaporator Water Supply Pipe Separator 7777 Vy 41271777 240 717777 Vlt WH 77777 TE Uo eV Cube Guide Water Tank Overflow Pipe tS I A k NS SS NARRA WAN NN SN y S ISSN tch EES f EAD Se 2 SEQUENCE OF OPERATION The steps in the sequence are as outlined below When power is supplied a 5 second delay occurs at startup Note that the order of the LEDs from the outer edge of the board 5 5 6 8 4 7 a ONE MINUTE FILL CYCLE LED 8 is on WV opens and the fill period begins After 1 minute the board checks for a closed F S If F S is closed the harvest cycle begins If not WV will remain energized through additional 1 minute cycles until water enters the sump and 5 closes This serves as a low water safety to protect the water pump b INITIAL HARVEST CYCLE LEDs 5 6 and 8 on WV remains open Comp energizes HGV opens and harvest begins As the evaporator warms the thermistor located on the suction line checks for a 9 C temperature When 9 C is reached 3 9 signal turns the harvest over to the adjustable harvest timer which is facto
55. tor This function is to clean the evaporator plate Control Switch Service Switch 20 1 WATER CIRCUIT AND REFRIGERANT CIRCUIT II TECHNICAL INFORMATION uolsuedxy UND ie q jejDujeg Tue i 1000 JO SILWIOY L 2014 gt 1 K TAE Joss iduoo X D Z A N lf Z eqng I NBA 4 4 seo 1oH i i l I l PA JeuieJs eur _ i uoyons Y ea O I Joje1ode 43 f Adans JOIEM eqn xa YOUMS eunsseJgd uBiH 21 2 WIRING DIAGRAM a PRODUCTION 2008 Auxiliary Code T 1 U 1 FLOAT CONTROLLER OME MUA
56. umbscrew on the right side 5 Remove the Thumbscrew on the left side Shift the Bin Control Switch to the left to remove 6 Refit the removed parts in the reverse order of the removal procedure 7 Plug in the icemaker or connect the power source Shift to the left and remove Remove Loosen Fig 13 47 13 THERMISTOR 1 Unplug the icemaker or disconnect the power source 2 Remove the Top Panel and unscrew the Rear Panel 3 Disconnect the Connector of the Thermistor lead orange 4 Remove the Ties Insulation Thermistor Holder and Thermistor in this order 5 Remove the old sealant from the Thermistor Holder and Suction Pipe 6 Wipe off any moisture or condensation from the Suction Pipe surfaces 7 Press a tube of the sealant KE4560RTV manufactured by Shin Etsu Silicones to the recess of the Thermistor Holder Slowly squeeze the sealant out of the tube and spread it smoothly in the recess Do not use any sealant other than the above 8 Attach the new Thermistor in position on the Suction Pipe and press down the Thermistor Holder over the Thermistor Be careful not to damage the Thermistor lead Cover the parts with the Insulation and secure them with the Ties Keep the Thermistor inside the Thermistor Holder After the Thermistor Holder is fitted do not pull the Thermistor lead to move the Thermistor 9 Refit the removed parts in the reverse order of the removal procedure 10 Plug in the icemaker or connect
57. uni uay pue oas OL old Jaye ouoo ul 104 sdojs ejnuiu SOINUILU OZ eun Is ugu WNWIXEJ e 1 10 268 09 JO 06 OF 0 1581 10 suni pue s zIBi eu yd JEALOUS S ISASUSIUA 9 9 S E dip 15 L W il 95 OL 10 vooy 29806 ues ine nL 10 jos Klo f 101 Jas 10198 295 0610 OS 010 snulu JaW 92991 ull 92991 UJnuurxelA JO JO SejnulLu 9 SI euin AM S ezeel e sejnului 9 SWI J JEM JSSAJBY UnullxelA e E 9 242 sdeis e o 2 3 ureig p e 2 2 ezeelJ e 9 2 2 1seAJEH Z anul euo L uonejedo 1ueuoduio pue peys eouenbes 3 CONTROL BOARD A HOSHIZAKI exclusive solid state control is employed in KM 100A and KM 125A Crescent Cubers All models are pretested and factory adjusted CAUTION Fragile handle very carefully A control board contains integrated circuits which are susceptible to failure due to static discharge It is especially important to touch the metal part of the unit before handling or replacing the board Do not touch the electronic devices on the board or the back of the board to prevent damage to the board Do not change wiring and connections Always replace the whole board assembly when it goes bad Do not short out the power supply to test for voltage a CONTROL
58. vaporator is not cold check to see if the hot gas valve is still open or if the expansion valve is not opening properly if the water valve is continuing to fill the reservoir if there are improper unit pressures or an inoperative compressor If the unit remains in freeze with the float switch removed replace the board Note Normal freeze cycle will last 0 to 40 minutes depending on model and conditions Cycle times and pressures should follow performance data provided in this manual 6 Drain Cycle The compressor remains energized the hot gas valve energizes the fan motor de energizes The drain valve and pump motor energize allowing water to drain from the tank for 10 seconds This removes contaminants from the water tank Diagnosis If the drain valve does not open check the circuit Check for proper voltage If water does not drain out check and clean the tubing at the drain valve and then check and clean the valve assembly 7 Normal Harvest Cycle same as the initial harvest cycle Return to step 4 Note Unit continues to cycle until bin control is satisfied or power is turned off The drain cycle can be adjusted to occur every cycle or every 2 5 or 10 cycles The factory default is every 10 cycles The unit always restarts at the 1 minute fill cycle 27 2 NO ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY 1 The icemaker a Power Supply 1 OFF position 1 Move to ON position will not start 2 Tighten
59. ve is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 10 30 or 50 seconds determined by the water saver timer setting whichever is shorter When the water valve closes the pump motor energizes and runs for the time determined by the water saver timer setting The water saver timer is factory adjusted and no adjustment is required Dip Switch Setting Time seconds CS s f Freeze Timer S1 dip switch 9 amp 10 CAUTION Adjust to proper specification or the unit may not operate correctly The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze up issues Upon termination of freeze timer machine initiates the harvest cycle After 2 consecutive timer terminations machine will shut down possibly indicating a problem The freeze timer is factory adjusted and no adjustment is required Dip Switch Setting Time minutes g Pump Out Pump Motor Delay S2 dip switch 1 The pump out pump motor delay determines whether or not the pump motor de energizes for 2 seconds before restarting at the beginning of a drain cycle The pump out pump motor delay is factory adjusted and no adjustment is required S2 Dip Switch Setting Delay _ Noe1 No 1 seconds Control Board P00013 02 h Refill Counter S2 dip switch 2 3 amp 4 Program Ver 2 5 or earlier Do not adjust These must be left in the factory default position or the unit
60. y Tubes Cean O ooo recharge loose attachment 2 Defective e Hot Gas Solenoid Valve 3 Wiring to Hot Gas 3 Check for loose Valve connection or open and replace f Water Supply Line 1 Too small requires 9 5 1 Increase water supply line mm OD line dedicated size per machine g Water Filter 1 Flow rate too small 1 Replace with filter that has larger flow rate 31 4 LOW ICE PRODUCTION 1 Freeze cycle a See chart 2 3 and check dirty Air Filter or Condenser ambient or water time is long temperature water pressure and refrigerant charge b See chart 3 1 and check Float Switch Inlet Water Valve and Control Board 2 Harvest cycle See chart 3 2 and check Control Board Thermistor Evaporator ambient time is long and or water temperature water supply line and Inlet Water Valve 5 ABNORMAL ICE PROBLEM POSSIBLE CAUSE REMEDY 1 Small cubes a Cube Guide 1 Out of position 1 Check that Cube Guide is Water Tank Circulated water falls properly installed on into bin Water Tank and tank is fixed securely with snaps b See chart 2 5 and check water supply line Inlet Water Valve water system Pump Motor and Control Board 2 Cloudy or a See chart 3 1 and 3 and check Float Switch Inlet Water Valve Control irregular cubes Board Spray Tubes water system refrigerant charge and Expansion Valve b Spray Guide c Water Quality 1 High hardness or 1 In

KM125A Service Manual

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